# 示例1
# from socketserver import ThreadingTCPServer
#
# obj = ThreadingTCPServer()
# obj.serve_forever()

# class A:
#     _name = "user"
#
# class B(A):
#     def test(self):
#         print(self._name)
#
# B().test()

class A:
    pass

print(type(A))
print(A.__class__)